Sequential Silver‐Catalyzed Oxidative Cyclization Reactions of Unprotected 2‐Alkynylanilines to Anthranils
Sign Up to like & getrecommendations! Published in 2017 at "European Journal of Organic Chemistry"
DOI: 10.1002/ejoc.201601600
Abstract: The full details of the original Ag-catalyzed domino oxidative cyclization reactions of unprotected 2-alkynylanilines with Oxone are described. The influences of several parameters including the substrate features, oxidant, reaction conditions, and catalyst on the reaction… read more here.
Keywords: silver catalyzed; reactions unprotected; cyclization reactions; unprotected alkynylanilines ... See more keywords
Metal-free visible-light-induced oxidative cyclization reaction of 1,6-enynes and arylsulfinic acids leading to sulfonylated benzofurans
Sign Up to like & getrecommendations! Published in 2020 at "Chinese Chemical Letters"
DOI: 10.1016/j.cclet.2019.05.041
Abstract: Abstract A new and convenient visible-light-induced method has been developed for the synthesis of sulfonylated benzofurans via oxidative cyclization reaction of 1,6-enynes and arylsulfinic acids. This reaction was carried out under metal-free and mild conditions,… read more here.
Keywords: sulfonylated benzofurans; oxidative cyclization; cyclization reaction; light induced ... See more keywords
Gold-Catalyzed Oxidative Cyclization Involving Nucleophilic Attack to the Keto Group of α,α'-Dioxo Gold Carbene and 1,2-Alkynyl Migration: Synthesis of Furan-3-carboxylates.
Sign Up to like & getrecommendations! Published in 2021 at "Organic letters"
DOI: 10.1021/acs.orglett.1c02389
Abstract: A multicomponent strategy for the synthesis of functionalized furan-3-carboxylates based on gold-catalyzed oxidative cyclization of diynones with alcohols or water has been developed. Mechanistic studies revealed that a rare nucleophilic attack to the carbonyl group… read more here.
Keywords: nucleophilic attack; group; furan carboxylates; gold catalyzed ... See more keywords
LiCl-Mediated and Palladium-Catalyzed Oxidative Cyclization of Furan-Ynes via Dearomatizing Alkoxyalkenylation of Furan.
Sign Up to like & getrecommendations! Published in 2022 at "Organic letters"
DOI: 10.1021/acs.orglett.2c01157
Abstract: A LiCl-mediated and palladium(II)-catalyzed oxidative cyclization of furan-ynes via dearomatizing alkoxyalkenylation of furan is reported to afford polyfunctionalized spiro-dihydrofurans with diastereospecification and high Z/E selectivity. This protocol is likely to involve chloropalladation of alkynes, subsequent… read more here.
Keywords: licl mediated; furan; mediated palladium; catalyzed oxidative ... See more keywords
Construction of Spirolactams by Unexpected Oxidative Cyclization of Alkenyl Diynes via Copper Catalysis.
Sign Up to like & getrecommendations! Published in 2023 at "Organic letters"
DOI: 10.1021/acs.orglett.3c00319
Abstract: A copper-catalyzed oxidative cyclization of alkenyl N-propargyl ynamides is described. This protocol enables the practical synthesis of diverse spirocyclic γ-lactams bearing an exocyclic double bond with generally high Z/E selectivity in moderate to good yields.… read more here.
Keywords: catalysis; copper; cyclization alkenyl; oxidative cyclization ... See more keywords
Preparation of 2,4,5-Trisubstituted Oxazoles through Iodine-mediated Aerobic Oxidative Cyclization of Enaminones.
Sign Up to like & getrecommendations! Published in 2018 at "Organic letters"
DOI: 10.1021/acs.orglett.8b00376
Abstract: A novel approach to trisubstituted oxazoles has been developed that is based upon an iodine-mediated aerobic oxidative cyclization of enaminone derivatives. This transition-metal-free procedure was highly efficient and involved the removal of four hydrogen atoms… read more here.
Keywords: iodine mediated; aerobic oxidative; mediated aerobic; trisubstituted oxazoles ... See more keywords
Fabrication of Core–Shell-Structured Organic–Inorganic Hybrid Nanocatalyst for the Expedient Synthesis of Polysubstituted Oxazoles via Tandem Oxidative Cyclization Pathway
Sign Up to like & getrecommendations! Published in 2017 at "ACS Omega"
DOI: 10.1021/acsomega.7b00382
Abstract: The quest for designing efficient heterogeneous catalytic systems for tandem oxidative cyclization reactions has provided a great impetus to research efforts, as it enables the step-economic construction of complex heterocyclic molecules as well as confers… read more here.
Keywords: shell structured; tandem oxidative; core shell; structured organic ... See more keywords
Metal-free oxidative cyclization of 2-aminobenzothiazoles and cyclic ketones enabled by the combination of elemental sulfur and oxygen
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DOI: 10.1039/c7gc02014g
Abstract: Metal-free oxidative cyclization for the one-pot synthesis of benzo[d]imidazo[2,1-b]thiazoles from 2-aminobenzothiazoles and cyclic ketones is described. Elemental sulfur combined with molecular oxygen as the benign co-oxidant was found to be unique and highly effective to… read more here.
Keywords: aminobenzothiazoles cyclic; free oxidative; metal; cyclic ketones ... See more keywords
Electrochemical oxidative cyclization of activated alkynes with diselenides or disulfides: access to functionalized coumarins or quinolinones
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DOI: 10.1039/c9gc02131k
Abstract: A direct electrochemical oxidative cyclization of activated alkynes with diselenides or disulfides toward functionalized coumarins and quinolinones has been developed. read more here.
Keywords: electrochemical oxidative; cyclization activated; oxidative cyclization; diselenides disulfides ... See more keywords
Selectfluor™-catalyzed oxidative cyclization of ynamides enables facile synthesis of oxazolidine-2,4-diones
Sign Up to like & getrecommendations! Published in 2019 at "Organic Chemistry Frontiers"
DOI: 10.1039/c9qo00845d
Abstract: A Selectfluor™-catalyzed oxidative cyclization of ynamides employing DMSO as the solvent and oxidant was achieved, affording oxazolidine-2,4-diones in moderate to excellent yields with high chemo-selectivity. The method offers an attractive alternative to existing protocols. read more here.
Keywords: cyclization ynamides; selectfluor catalyzed; oxazolidine diones; catalyzed oxidative ... See more keywords
Visible-Light Induced and Copper-Catalyzed Oxidative Cyclization of Substituted o-Aminophenylacetylene for the Synthesis of Quinoline and Indole Derivatives
Sign Up to like & getrecommendations! Published in 2021 at "Organic Chemistry Frontiers"
DOI: 10.1039/d1qo00914a
Abstract: Herein we report on the development of a mild and efficient intramolecular oxidative cyclization reaction of substituted aromatic enamines and C(sp3)-H bond adjacent to nitrogen with alkynes or alkenes, leading... read more here.
Keywords: light induced; cyclization; visible light; induced copper ... See more keywords